Revert "Link rt just with libzmq."

This reverts commit 2b29e831f4d7879b8cbd3b285a4e33fed5e2b989.
Revert "Take platform + compiler type into account for previous patch."

This reverts commit 3b2a7dee492abb46c01fc2f9759ea850eee77e85.
Revert "Fixed linking with realtime library."

This reverts commit c1355ad3b7d4d389b39acb186f4588411fc99119.
Fixed just zmq detection